Film reel for motion-picture-projecting apparatus



March 30,1926. I 1,578,894

H. W. JOY

FILM REEL FOR MOTION PICTURE PROJECTING APPARATUS Original Filed Feb. 5,1924 L Henry W. I0

avwewboz 1A awe/mm Patented Mar. 30,1926.

' UNITED STAT mm! "W. JOY, OI CBUGEBS-ON-HUDSON, NEW YORK.

m m FOB KOTION-PICTUBE-PBOJEOTING APPABATUS.,

Original application ma lebruary 5, 1824, Serial No. 890,706. Dividedand this application filed November 12, 1924. Serial 1T0. 748,391.

To all whom it may come-rm Be it known that I, HENRY WV. JOY, a. subjectof the King of Great Britain, residing at Crugers-on-Hudson,WestchesterCounty, State of New York, have invented new and 'useful Improvements inFilm Reels for l\' lotion-Picture-Projecting Apparatus, of which thefollowing is a specification.

This invention relates generally to portable motion picture projectingapparatus, and has specific reference to certain improvements in theconstruction of film reels,

the present invention being to matter divid-' ed out of my applicationfor Letters Patent of the United States, filed February 5, 1924, Ser.No. 690,706, and the object thereof is to provide a film reel with meansfor receiving, holding and automatically releasing the end of a film.

v My invention is illustratively exemplified in the accompanyingdrawings in which Figure 1 is a transverse sectional view of my improvedreel showing the film holding and releasing means; and Figure 2 is avdetail sectional view of the film gripping means as applied to the coreof the reel, the view being taken on lines 2-2 of Figure 1.

Referring to the drawing, 10 denotes the parallel circular discs orflanges which are preferably perforated for the purpose of reducing theweight. An annular member or core 11 separates the two discs 10 andcomprises a curved piece of sheet metal having an inward radialprojection 12 extending to a point short of the hub 13 of the reelproper. The opposite end of the curved piece of metal approaches theupper portion of the radial projection 12 to a point just short ofmaking contact and is curved slightly inwardly to provide a lip 14. Theend of the film is inserted in the opening between the parts 12 and 14:and is then engaged by a gr1 ping device, comprising a pair of cars 15with openings to receive the hub 13, said cars 15 bein internal parts ofan angular plate 16 havlng a straight portion 17 disposed parallel tothe projection 12, and a finger plate 18 projecting at right angles tothe plane of the straight portion. The end of the finger plate 18projects to a point short of the inner periphery of the core 11 and atan elevation just over the stop lip 19 which is bent inwardly fromthecore. The other end of the ortion 17 is bent over one half a completecircle and the free end projects inwar ly and radially and is disposedclosely adjacent the rojection 12. A curved spring 20 is attache at oneend to the portion 107 and at the other end it yieldably engages againstthe inner periphery of the core.

To attach a strip of film to the reel, the end of the strip is insertedbetweenthe projection 12 and adjacent surface of the part 17 which isyieldably held against the film by the spring 20. As the reel is rotatedin the usual manner the film coils about the core 11, the frictionalengagement of the two parts 12 and 17 being sufficient to prevent theinterposed film from escaplng. When the film is being unwound from onereel and the last coil 1s reached, there is a point at which the radiusdescribedby the engaged end of the film will coincide with a linetangent to the periphery of the film on the other reel in the devicewhereupon the end of the film will be readily released from the firstreel.

What I claim is 1. A reel for motion icture film, comprising a slottedcore having a radially disosed wall on one edge of said slot and aninwardly curved li on the other edge, and means for yielda ly engagingthe film against the said wall, said means comprising a loosely mountedmember having a wall disposed parallel to said radial wall in the core,and a spring carried by the member and engaged with the core toyieldably press the wall of the member in the direction of the wall ofthe core.

2. A reel for motion picture film, comprising a core bent to forman'annular member and having one end disposed radially towards thecenter of the reel and the other end curved inwardly slightly to providea lip, said lip being in a position short of contacting with the radialportion, a thimble disposedcentrally'of said reel, and a spring pressedfilm clamping member loosely disposed on said thimble and having astraight portion terminating in a bent over endportion disposed closelyadjacent and parallel to said radial portion of the core, the oppositeend of the straight portion thereof beone end to the straight portionand contacting bent at an angle to the plane of the said ing at theother end against the-wall of the portion, an inwardly turned lip cutfrom the core to normally hold the bent over portion 10 curved wall ofthe core and disposed in the in frictional engagement with the surfaceof 5 path ofpossihle movement of the said bent the interposed film. Iportion 1n :1 direction to cause the arallel In testimony whereof Iafiix my signature. portion to separate, and a spring xed at HENRY W.JOY.

